Kotrag of Bolghar

Kotrag of Bolghar (631-702) was the high chief of Bolghar from 665 to 702, succeeding Khan Kubrat of Bulgaria and preceding Kuber of Bolghar.

Biography
Kotrag was the son of Khan Kubrat of Bulgaria, and was of the Tengri Dulo tribe of the Bolghars. Kotrag became the high chief of Bolghar in 665 on his father's death, and reigned until 702, when his son Kuber of Bolghar succeeded him.